To issue a refund to a client you should open that client’s application for your service. You will see an option to refund on the right hand side of the screen in the PAYv tab.
When you click the refund button it will bring up a pop-up. You can choose to issue a full or partial refund. Once you have accepted the refund amount you can choose to add a personal message to the client and click the approve refund button.
Once you click approve refund it will be issued to the client and returned to their PAYv balance. They will receive an email informing them of the refund and sharing your message.